Help Center/ Cloud Adoption Framework / Cloud Adoption Framework and Practices/ Solution Design/ Designing the Application Architecture/ Availability Design/ Definition

Updated on 2025-05-07 GMT+08:00

View PDF

Definition

Availability is the probability that a product or service is reliable and maintainable under defined conditions at a given time. Service availability is generally measured by Service-Level Agreement (SLA). Each type of cloud service provides services based on their SLA commitment. The following table lists the downtime acceptable for different SLA commitments.

**Table 1** SLA levels
SLA	Weekly Downtime	Monthly Downtime	Annual Downtime
99%	1.68 hours	7.2 hours	3.65 days
99.90%	10.1 minutes	43.2 minutes	8.76 hours
99.95%	5 minutes	21.6 minutes	4.38 hours
99.99%	1.01 minutes	4.32 minutes	52.56 minutes

Parent topic: Availability Design

Previous topic: Availability Design

Next topic: Availability Zone

Feedback

Was this page helpful?

Helpful Not helpful

Provide feedback

Thank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.

The system is busy. Please try again later.

Which of the following issues have you encountered?

Content is inconsistent with the product UI

Unclear descriptions

Lack of examples or code

Incorrect steps

Can't find what I need

Lack of best practices

Feedback (optional)

0/500

Select at least one type of issue, and enter your comments or suggestions.

Enter a maximum of 500 characters.

Submit Cancel

For any further questions, feel free to contact us through the chatbot.